# Amp — GPT-5.5 In Deep

- Company: Amp (ampcode.com)
- Announced: 2026-05-04
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://ampcode.com/news/gpt-5.5
- Record: https://forck.live/items/7750-gpt-5-5-in-deep
- Subject: Amp
- Models affected: GPT-5.5

Amp has updated its deep mode to run on GPT-5.5, which is a better coding agent than GPT-5.4 with improved steerability, interactivity, and constraint adherence. The default reasoning effort in deep mode was changed from high to medium because higher effort performed worse in evaluations.

## Evidence

Verbatim from https://ampcode.com/news/gpt-5.5:

> GPT-5.5 now powers Amp's deep mode.

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Record: https://forck.live/items/7750-gpt-5-5-in-deep
Catalogue: https://forck.live/llms.txt
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